package com.e;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class CookieServlet
 */
public class CookieServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public CookieServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see Servlet#init(ServletConfig)
	 */
	public void init(ServletConfig config) throws ServletException {
		// TODO Auto-generated method stub
	}

	/**
	 * @see Servlet#destroy()
	 */
	public void destroy() {
		// TODO Auto-generated method stub
	}

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		//response.getWriter().append("Served at: ").append(request.getContextPath());
		Cookie[] cookies=request.getCookies();
		
		response.setCharacterEncoding("UTF-8");
		response.setContentType("text/html");
		PrintWriter writer=response.getWriter();
		
		if (cookies!=null) {
			for (int i = 0; i < cookies.length; i++) {
				writer.println(cookies[i].getName());
				writer.println(cookies[i].getValue());
				if (cookies[i].getName().equals("userName")) {
					Cookie cookie=new Cookie("userName", "Jack");
					response.addCookie(cookie);
				}else if(cookies[i].getValue().equals("Jack")){
					Cookie cookie=new Cookie("userName", "Jack");
					cookie.setMaxAge(0);
					response.addCookie(cookie);
					
				}else {
					Cookie cookie=new Cookie("userName", "Tom");
					cookie.setMaxAge(60*30);
					response.addCookie(cookie);
				}
			}
		}else {
			writer.println("没有cookie");
		}
		writer.flush();
		writer.close();
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}
